(tumme-get-thumbnail-image): Add missing arg to `error'.

(tumme-get-thumbnail-image): Add missing arg to `error'.
Fix typo in message.
(tumme-gallery-generate): Fix typo in `error' message.
(tumme-display-window-height-correction, tumme-display-window-width-correction,
tumme-line-up-dynamic, tumme-line-up-interactive): Dox fixes.
(tumme-cmd-rotate-original-options, tumme-display-properties-format,
tumme-restore-window-configuration, tumme-format-properties-string,
tumme-create-thumbs, tumme-display-previous-thumbnail-original): Fix typos in
docstrings.